Launched by Napoleon's soldiers more than 200 years ago, a cannonball remains embedded in the tower wall.

A sculpture of a beloved local figure, who tipped his top hat to everyone he passed on the streets of Bratislava.

This Slovakian statue of an emerging sewer worker might just be a bronze peeping tom.

This statue points to another unusual companion work of art often overlooked by visitors.

The private train station King Leopold II built for the Belgian royal family now lies abandoned.

This huge limestone slab is considered the largest paving stone in Belgium and a relic of the earliest modern paving in Brussels.

In the middle of a Brussels roundabout, a cargo container balancing on its edge.

This collection of over 50 murals celebrates Brussels' rich history as the self-proclaimed home of the "comic strip."

From Tintin to the Smurfs, Europe's greatest graphic icons are celebrated in a grand Art Noveau gallery.

The world's tallest boat lift stands as a massive piece of industrial tourism.

A visionary precursor to the Internet made of index cards.

You can spot this teeny tiny stained-glass window from the Bonifacius bridge.

From motorcycles to firetrucks and sports cars to horse-drawn carriages, this Belgian collection goes beyond rare cars.

A little sculpture with a large wardrobe.

At less than four inches in height, this iconic fictional character is the smallest public statue in all of Moldova.

A statue dedicated to the founders of communism.

Once the tallest building in Chisinau, this unique tower is a relic of Soviet architecture.

This abandoned Soviet circus is slowly being restored to its Communist-era glory.

Once built to inspire young Soviet minds through astronomy, this dome now stands as a quiet relic of a vanished era.

This 13th century Orthodox monastery is built right into the Moldovan cliffside.

A forgotten remnant of the Soviet Union, Transnistria is an unrecognized country hidden behind a heavily militarized border between Moldova and Ukraine.

Heralded as the world's first theater, these ruins are often overlooked as they reside in the shadows of the Acropolis.

This gem is often wrongly overshadowed by the larger, newer Metropolis church in Athens.

This small 16th-century church in Athens is almost entirely surrounded by a modern building.